Good-Win Racing Mazda Performance Parts

Miata MX5 2006-2015 · 2.5 Liter Engine Conversions


Good-Win Racing has long specialized in 2.5 conversions for the NC Generation Miata.  We raced and set track records in the first serious 2.5 liter fully caged NC (Project NC LIGHT detailed in our forum) and later developed our dual purpose street/autocross/track "Project Blue" shown above..  The reason to use the 2.5 is easy to understand, it's a bigger Mazda factory motor that is easily installed into the NC Generation Miata for a reliable normally aspirated 200 hp Miata when trimmed with all our 2.5 goodies below.   Or add boost and make 300 HP and more! Our Project BLUE shown above with our big 1.8 Inch Header and a custom built 2.5 liter running on E85 and making over 220 hp at the wheels!  We do these installs here...and we sell you the parts below to help YOU get the most from your 2.5 conversions.

Uncategorized 2.5 Liter Engine Conversions

Goodwin Racing Triple-Pass Radiator Goodwin Racing Triple-Pass Radiator
2006-2015

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$499.00
Goodwin Racing Oil Cooler and Thermostat Kit Goodwin Racing Oil Cooler and Thermostat Kit
2006-2015
$519.00
CSF Miata MX5 Radiator CSF Miata MX5 Radiator
2006-2015
$359.99
NC Aluminum Coolant Expansion Tank NC Aluminum Coolant Expansion Tank
2006-2015
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$249.00
$224.00
RoadsterSport EPDM Engine Mount RoadsterSport EPDM Engine Mount
2006-2015 · all
$99.00
RoadsterSport MX-5 Competition Motor Mounts RoadsterSport MX-5 Competition Motor Mounts
2006-2015
$149.00
RoadsterSport MX-5 Engine Drop Brackets RoadsterSport MX-5 Engine Drop Brackets
2006-2015
$179.00
$149.00
Singular Motorsports NC Miata Hood Louvers Singular Motorsports NC Miata Hood Louvers
06-15

New V2 anodized Black

$199.00
Steel and Polyurethane Motor Mounts 70 Durometer SHORT for 2.5 Conversions Steel and Polyurethane Motor Mounts 70 Durometer SHORT for 2.5 Conversions
2006-2015
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$220.00
V8 Roadsters Clutch Kit V8 Roadsters Clutch Kit
2006-2015
$265.00
V8 Roadsters Drive Line Kit V8 Roadsters Drive Line Kit
2006-2015
$1,295.00
V8 Roadsters LSX Mounting Kit V8 Roadsters LSX Mounting Kit
2006-2015
$2,450.00

Current Specials!

Miata MX5 2006-2015: 2.5 Liter Engine Conversions


NC Aluminum Coolant Expansion Tank NC Aluminum Coolant Expansion Tank
2006-2015
Order Now for Free Shipping on this Item! *
$249.00
$224.00
RoadsterSport MX-5 Engine Drop Brackets RoadsterSport MX-5 Engine Drop Brackets
2006-2015
$179.00
$149.00
Steel and Polyurethane Motor Mounts 70 Durometer SHORT for 2.5 Conversions Steel and Polyurethane Motor Mounts 70 Durometer SHORT for 2.5 Conversions
2006-2015
Order Now for Free Shipping on this Item! *
$220.00

* Free shipping offers apply only to destinations within US Lower 48.

REVIEWS

After reading many other positive reviews on both the GWR and Miata forums I finally decided to buy this product. My main concern for many months was whether or not I was up to the task of installing the header. But with the excellent instructions on Brian's forum as well as several Miata forum threads it turned out easier than I expected. After receiving notice that the header would arrive on a Friday afternoon, I began the disassembly process. After about 3 hours I had the stock manifold out. Later that afternoon the new catted header arrived right on schedule. And it is a thing of beauty. I opted for the stainless version. Installation on Saturday morning took another 3 hours, although I could have shaved some time off of that but I was actually enjoying the process of double checking torque values and cleaning up my engine compartment. I already have the GWR catted midpipe, so that connection was a snap. I put everything back together, reconnected my battery, and went for a drive. NO CODES! Nice throaty sound with my RSII muffler, and a significant boost in power and low/mid torque. Another happy camper here. I since have added a M-E tune and I feel I have realized all of the gains that Brian has achieved on his 2012 project Miata. I've put several hundred miles on my Miata since the install with zero problems. This is the car that Mazda should have built all along. Thanks Brian.

-- Ron P.

Just wanted to thank you guys for the great stuff and great work done on my MX5 club yesterday. I could feel the difference in sound and performance right away! It drives and corners awesome now. Can't wait to tell my friends about you guys. I'll be keeping an eye on your web site for other goodies and events as well. Can't wait to try my new suspension out on a auto cross. Will definitely be trying it on some twisty roads this weekend. Just can't wipe that smile off my face when driving this car. Thanks again guys!

-- Paul Young